add inc seq sum

--HG--
rename : exercise/ex07/e2_knapsack/data/1.in => exercise/ex07/e3_knapsack/data/1.in
rename : exercise/ex07/e2_knapsack/data/1.sol => exercise/ex07/e3_knapsack/data/1.sol
rename : exercise/ex07/e2_knapsack/data/10.in => exercise/ex07/e3_knapsack/data/10.in
rename : exercise/ex07/e2_knapsack/data/10.sol => exercise/ex07/e3_knapsack/data/10.sol
rename : exercise/ex07/e2_knapsack/data/2.in => exercise/ex07/e3_knapsack/data/2.in
rename : exercise/ex07/e2_knapsack/data/2.sol => exercise/ex07/e3_knapsack/data/2.sol
rename : exercise/ex07/e2_knapsack/data/3.in => exercise/ex07/e3_knapsack/data/3.in
rename : exercise/ex07/e2_knapsack/data/3.sol => exercise/ex07/e3_knapsack/data/3.sol
rename : exercise/ex07/e2_knapsack/data/4.in => exercise/ex07/e3_knapsack/data/4.in
rename : exercise/ex07/e2_knapsack/data/4.sol => exercise/ex07/e3_knapsack/data/4.sol
rename : exercise/ex07/e2_knapsack/data/5.in => exercise/ex07/e3_knapsack/data/5.in
rename : exercise/ex07/e2_knapsack/data/5.sol => exercise/ex07/e3_knapsack/data/5.sol
rename : exercise/ex07/e2_knapsack/data/6.in => exercise/ex07/e3_knapsack/data/6.in
rename : exercise/ex07/e2_knapsack/data/6.sol => exercise/ex07/e3_knapsack/data/6.sol
rename : exercise/ex07/e2_knapsack/data/7.in => exercise/ex07/e3_knapsack/data/7.in
rename : exercise/ex07/e2_knapsack/data/7.sol => exercise/ex07/e3_knapsack/data/7.sol
rename : exercise/ex07/e2_knapsack/data/8.in => exercise/ex07/e3_knapsack/data/8.in
rename : exercise/ex07/e2_knapsack/data/8.sol => exercise/ex07/e3_knapsack/data/8.sol
rename : exercise/ex07/e2_knapsack/data/9.in => exercise/ex07/e3_knapsack/data/9.in
rename : exercise/ex07/e2_knapsack/data/9.sol => exercise/ex07/e3_knapsack/data/9.sol
rename : exercise/ex07/e2_knapsack/gen.rb => exercise/ex07/e3_knapsack/gen.rb
rename : exercise/ex07/e2_knapsack/problem_en.odt => exercise/ex07/e3_knapsack/problem_en.odt
rename : exercise/ex07/e2_knapsack/problem_en.pdf => exercise/ex07/e3_knapsack/problem_en.pdf
rename : exercise/ex07/e2_knapsack/solution/knapsack => exercise/ex07/e3_knapsack/solution/knapsack
rename : exercise/ex07/e2_knapsack/solution/knapsack.cpp => exercise/ex07/e3_knapsack/solution/knapsack.cpp